"To lose one's shit" has a very similar meaning as "to lose one's mind" Except your mind is
brown,
ugly, smelly, often watery, and is being
dropped in, and clogging toilets at an alarming rate, as we speak.
To lose one's shit, can be used in this
case.
Guy: Was
Kanye on
grass when he wrote "Lift Yourself"?!
Guy 2: Fo' sheezy nigga, he lost his shit.